Google Reader

Despite the fact that Web apps are viewed by some as the ugly stepchild of the iPhone, my most-used app is Google Reader. It’s like Marvelous Marvin Hagler—the fantastic, undisputed middleweight boxing champion back in the 1980s—because it’s so much better than its rivals. Part of the reason it’s such a great app is that Google has regularly and lovingly tweaked it, adding niceties that make it easier to use and features that bring it ever closer to the capabilities of its desktop counterpart.